Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 13,344	$ 122,567
Adjustments to reconcile net income to net cash provided by operating activities:
Income from discontinued operations, net	(6,849)	(122,109)
Deferred income taxes	23,123	(2,187)
Depreciation, depletion and amortization	4,635	6,597
Equity in loss of joint ventures	1,282	36
Gain on sale of equipment and property	(657)	(19)
Stock-based compensation	206	1,169
Realized gain on available for sale investments	(591)	290
Net changes in operating assets and liabilities:
Accounts receivable	(355)	(123)
Deferred costs and other assets	(922)	(909)
Accounts payable and accrued liabilities	(1,252)	673
Income taxes payable and receivable	(17,335)	940
Other long-term liabilities	2,148	(1,943)
Net cash provided by operating activities of continuing operations	16,777	4,982
Net cash used in operating activities of discontinued operations	(1,756)	(46,642)
Net cash provided by (used in) operating activities	15,021	(41,660)
Cash flows from investing activities:
Investments in properties	(9,360)	(5,729)
Investments in joint ventures	(16,226)	(7,160)
Purchases of investments available for sale	(36,941)	(313,306)
Proceeds from sales of investments available for sale	89,260	121,161
Proceeds from the sale of assets	8,405	77
Cash held in escrow	(6,532)	(33,937)
Net cash provided by (used in) investing activities of continuing operations	28,606	(238,894)
Net cash provided by investing activities of discontinued operations	11,525	340,744
Net cash provided by investing activities	40,131	101,850
Cash flows from financing activities:
Distribution to noncontrolling interest	(1,086)	(765)
Repayment of long-term debt	0	(1,552)
Repurchase of Company Stock	(7,714)	0
Exercise of employee stock options	347	1,231
Net cash used in financing activities of continuing operations	(8,453)	(1,086)
Net cash used in financing activities of discontinued operations	0	(28,846)
Net cash used in financing activities	(8,453)	(29,932)
Net increase in cash and cash equivalents	46,699	30,258
Cash and cash equivalents at beginning of year	22,547	4,524
Cash and cash equivalents at end of the period	$ 69,246	$ 34,782